Well honestly, these comments are far more rude than being told that you look like Steve Buscemi. How do you think he would feel if he saw that you consider a resemblance to him to be an insult? OP wasn't called 'ugly'; her resemblance to a public figure was noted. You decided that that's something horrible.

Oh, he was kinda funny lookin' In what way? Oh, just in a general kinda way

Throw him off, tell him you've mistaken him for Gary Busey!

Steve may not be a looker, but he's a good actor and a pretty decent human being. So there's something positive you can take from that.